​Abstract:Quantum physics provides famous puzzles. These include Schroedinger's cat, Einstein’s spooky action at a distance and quantum randomness​(viz. Einstein's comment that God does not play dice). To date, the fundamental concepts, demonstrated by these puzzles, became the basis for the emerging quantum information technology. It includes quantum teleportation, and quantum computation. The future quantum internet will combine these ideas. It will consist of quantum computers connected by quantum links carrying photons. From a fundamental point of view, these experiments have sharpened our basic questions about the nature of quantum systems.